Pool salt calculator
Salt bags to reach your saltwater target ppm.
Short answer: lbs = (gallons × ppm to raise) ÷ 120,000. 20,000 gal × 3,200 ppm ÷ 120,000 ≈ 533 lb = 14 bags of 40 lb. Enter your measurements above and the pool salt calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Salt to add
533 lb
+3200 ppm
40 lb bags
14
Kilograms
242 kg
How does the pool salt calculator work?
lbs = (gallons × ppm to raise) ÷ 120,000.
What does a worked example look like?
20,000 gal × 3,200 ppm ÷ 120,000 ≈ 533 lb = 14 bags of 40 lb.
What do people ask most?
›Ideal salt level?
Most chlorinators target 2,700–3,400 ppm; 3,200 is common.
›Can I use table salt?
No — use pool-grade non-iodized salt only.
Which pool calculator should you use next?
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.